将我的 .net core API 发布到 azure 应用服务后无法编辑文件

问：

Not.rld 仅 wwroot 文件夹 .net core app 中的任何文件。当我在本地运行我的 .net core 应用程序时，我可以编辑它，即使当我将其发布到另一台服务器时它也能正常工作。但在发布 Azure 应用服务后，它无法编辑文本文件。
它显示 500 错误。

是权限相关问题吗？我该如何解决. 这在我的示例代码中。

 var localRdlcFilePath = Path.Combine(Path.GetTempPath(), "prescription.rdl");  
     QRCodeGeneratorHelper.DownloadRdlcFileFromAzureStorage(connectionString, containerName, blobName, localRdlcFilePath);

可能是上面的线使问题。

QRCodeGeneratorHelper.DownloadRdlcFileFromAzure存储代码：

public static void DownloadRdlcFileFromAzureStorage(string connectionString, string containerName, string blobName, string localFilePath)
    {
        CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
        CloudBlobContainer container = blobClient.GetContainerReference(containerName);
        CloudBlockBlob blob = container.GetBlockBlobReference(blobName);

        using (var fileStream = File.OpenWrite(localFilePath))
        {
            blob.DownloadToStreamAsync(fileStream).Wait();
        }
    }

完整代码：

try
            {
                int extension = 1;
                string mimtype = $"";
                var prescription = await _prescriptionRepo.GetPriscriptionById(id);
                //Azure Blob
                string connectionString = "connectionstringhere";
                string containerName = "namehere";
                string blobName = "report/prescription.rdl";
                var localRdlcFilePath = Path.Combine(Path.GetTempPath(), "prescription.rdl");
                QRCodeGeneratorHelper.DownloadRdlcFileFromAzureStorage(connectionString, containerName, blobName, localRdlcFilePath);
                List<ImageStorage> datasrc2 = new()
            {
                new ImageStorage() {Id=1,Image = GenerateQrCode("http://www.outreachforall.org/")},
            };
                // End Of QR code

                var pres = _mapper.Map<GetPrescriptionForReport>(prescription);
                Dictionary<string, string> parameter = new Dictionary<string, string>
            {
                { "patientname", $"{prescription.Patient.FirstName} {prescription.Patient.LastName}" },
                { "prescriptionid", $"{prescription.PatientId}" },
                { "advice", $"{prescription.Note}" },
                { "doctorname", $"{prescription.DoctorFirstName} {prescription.DoctorLastName}" },
                //{"image", imagae}
            };
                LocalReport localReport = new LocalReport(localRdlcFilePath);
                localReport.AddDataSource("DataSet1", pres.MedicineForPrescription);
                localReport.AddDataSource("DataSet2", datasrc2);
                var result = localReport.Execute(RenderType.Pdf, extension, parameter, mimtype);
                var foo = File(result.MainStream, "application/pdf");
                foo.FileDownloadName = $"{prescription.PatientId}-{prescription.Patient.FirstName} {prescription.Patient.LastName}.pdf";
                return foo;
            }
            catch (Exception ex)
            {
                // Log or handle the exception appropriately
                throw;
            }